tiling a backporch - Contractor Talk - Professional Construction and Remodeling Forum

s.smith · 02-11-2007, 11:52 AM

I have a back porch slab that is 15x11. Do I need any underlayment(durock or any thing else) or can I just put thin set or a mud set on top of the slab????

A.W.Davis · 02-11-2007, 11:57 AM

I would think that it would be fine to do that if you just put a mesh tape on any apparent cracks in the slab, that will isolate the tile from the crack and prevent the tile from cracking in the future.

tcleve4911 · 02-11-2007, 12:08 PM

SCHLUTER underlayment !!!!!!

firemike · 02-11-2007, 02:58 PM

Quote:

Originally Posted by tcleve4911

SCHLUTER underlayment !!!!!!

Schluter Ditra is exactly want you want, go to here
http://www.schluter.com/english/prod...601-index.html

and here for accessories
http://www.schluter.com/english/prod...section-g.html

phillytile · 02-11-2007, 03:13 PM

You don't need Schluter Ditra, you can thinset right over the slab as long it is somewhat flat. Use a self leveling compound for any rough or uneven areas. If there are any cracks in the slab, use an antifracture membrane such as redgard.

R&D Tile · 02-11-2007, 07:05 PM

Quote:

Originally Posted by A.W.Davis

I would think that it would be fine to do that if you just put a mesh tape on any apparent cracks in the slab, that will isolate the tile from the crack and prevent the tile from cracking in the future.

That won't work.

And I wouldn't use Redgard either.

What condition is the slab in, I wouldn't tile a 15x11' slab without a sheet membrane first, good insurance, is it pitched for water runoff, freeze thaw issues, what type of tile?